Altera Triple Speed Ethernet MegaCore Function Manuel d'utilisateur Page 104

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DescriptionR/WNameBit(s)
Enables the unidirectional function. This bit depends on bit
12. When bit 12 is one, this bit is ignored.
When bit 12 is zero, bit 5 indicates the unidirectional
function:
A value of 1 enables transmit from media independent
interface regardless of whether the PHY has determined
that a valid link has been established.
A value of 0 enables transmit from media independent
interface only when the PHY has determined that a valid
link has been established.
The reset value of this bit is zero.
RWUNIDIRECTIONAL_ENABLE5
Indicates the operating mode of the PCS function. Bits 6
and 13 are set to 1 and 0 respectively. This combination of
values represent the gigabit mode.
Bit [6, 13]:
00: 10 Mbps
01: 100 Mbps
10: 1 Gigabit
11: Reserved
ROSPEED_SELECTION6, 13
The PCS function does not support half-duplex mode. This
bit is always set to 0.
ROCOLLISION_TEST7
The PCS function only supports full-duplex mode. This bit
is always set to 1.
RODUPLEX_MODE8
Set this bit to 1 to restart the auto-negotiation sequence. For
normal operation, set this bit to 0 (reset value).
RWRESTART_AUTO_
NEGOTIATION
9
Set this bit to 1 to isolate the PCS function from the MAC
layer device. For normal operation, set this bit to 0 (reset
value).
RWISOLATE10
Set this bit to 1 to power down the transceiver quad. The
PCS function then asserts the powerdown signal to indicate
the state it is in.
RWPOWERDOWN11
Set this bit to 1 (reset value) to enable auto-negotiation.RWAUTO_NEGOTIATION_ENABLE12
PHY loopback. Set this bit to 1 to implement loopback in
the GX transceiver. For normal operation, set this bit to 0
(reset value). This bit is ignored if reduced ten-bit interface
(RTBI) is implemented.
This feature is supported in all device families except the
Cyclone IV GX device families.
RWLOOPBACK14
Altera Corporation
Configuration Register Space
Send Feedback
6-21
Control Register (Word Offset 0x00)
UG-01008
2014.06.30
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